Detector device.



PATENTED APR. 2, 1907.

S. W. WARDWELL. DETECTOR DEVICE.

APPLICATION FILED JAN. 24, 1906.

w/r/vzsses 6. G M J4 UNITED STATES PATENT OFFICE.

SIMON W. WARDWELL, OF PROVIDENCE, RHODE ISLAND.

DETECTOR oEvlcE.

Specification of Letters Patent.

Patented April 2, 1907.

To all whom it may concern:

Be it known that I, SIMON W. WARDWELL, a citizen of the United States, residing at Providence, in the county of Providence and State of Rhode Island, have invented certain new and useful Improvements in Detector Devices, of which the following is a specification. a

My invention is a device for detecting defective insulation, particularly in the winding processes of preparing and making electrical coils for electromagnets, electrical-in.- struments, and similar purposes where per,- fect insulation is essential.

In the accompanying drawings, which form a part of this specification, Figure 1 represents my invention as applied to a winding device, showing how it is used; 2, a detail of the invention, being sectional of Fig. 3 on the line A A; Fig. 3, a detail in elevation; Fi 4, a section onthe line 2 2 of Fig. 2.

Fig. 1 shows the device partly in diaam to illustrate the electrical connections.

11' it 2 represents the shaft or spindle of a winding-machine, and 3 a supply from which the insulated wire is unwound.

4 is a guide-wheel over which the insulatedwire is drawn in its course from the supply 3 to the spindle 2, on which it is wound. Connected with the winding-spindle 2 is a stop device of usual form, such as is employed to arrest the machines operation upon the occurrence of a defect, the breaking of the material'wound, or the exhaustion of the supply. Herein is shown and described only those elements or adjustments of the stop device which directly act to effect the stopping of the winding when there occurs a defect in or lack of insulation on the wire being wound. The spindle2 and its adjuncts, the device for holding the su ply 3, and the guide-wheel4, together with t e stop devices referred to, are all components of the windin -1nachine.

On the spindle of the win ing-machine or connected with it is a toothed wheel or ratchet 5.

Adjacent the ratchet is fulcrumed a lever 6, in which is slidably mounted a bar or dagger 7, whose extremity 8 normally lies close to but out of the path of action of the ratchet 5, retained there by any suitable agency, as the wei ht of the lever 6.

C iosely adj acent to the lever 6 is an electric motorfor instance, an electromagnet 9 and said magnet is part of an electrical circonnected with the machine.

cuit which derives its current from a suitable source of electrical energy 10. The circuit extends from the source 10 aforesaid to the machine, referably to the metal spindle or core 11, w ich holds the su 'pl 3, and thence to the wire 12, one end of w hich is electrically This cannot Well be shown in the drawings; but an obvi- .ous mode of connectionis to wrap the loose lend from theinside of the supply-coil 3v about the supply-spindle 11. The other side of the electrical circuit runs to the electromagnet 9,

including it, and extending therefrom to the guide-wheel 4, to which it is electrically con nected, as shown in Fig. 1, byattachment to the pin or stud 14, on which the wheel turns, or, in Fig. 2, by a brush 13, which bears on the hub of the guide-wheel.

When connected as shown'in F' 2, the guide-wheel is electrically insulated rom the rest of the machine and its connections by suitable means.

As indicated in Fig. 3, the stud.14 is supported in a bushin 15, of insulating material, and its head 1 6 and the nut 17 are likewise insulated by the washers 18 and 19 from adjacent metal; The circuit thus formed is manifestly an open circuit, energized on the sideas far as the guide-wheel 4 and on the side to the insulated wire 12, which runs over the wheel. tion whatever on the wire, or were the wire bare in spots or so loosel insulated as to metallically contact with tiie wheel 4, then the circuit would be closed and the magnet 9 would be ener ized, the lever 6 would be drawn toward t e magnet, and the dagger 7 would be moved into the path of actlon of the ratchet 5 and by it shifted, and the movement of the dagger would act upon or affect the stop devices of the machine to arrest its action.

The stopping mechanism of the machine may be of any well-known arran ement, one means for controlling it being illustrated in Fig. 1, in which a lever 23 is mounted on a rocket-shaft 24, adapted to throw the clutch or other device. At its lower end the lever 23 has a shoulder 25, engagin a correspond ing shoulder on the detentever 26. The detent-lever 26 is connected by a wire 27 to a rocking member 28, pivoted on the stud 29 and engaged by a pin 30, projecting from the dagger 7. When the dagger 7 is engaged and moved by the ratchet 5, the mem- Were thereno insulaher 28 is rocked or tilted, and the wire 27 lifts the detent-lever 26, releasing the lever 23, and allowing the shaft 24 to rock, under action of a spring 31, to, act on the clutch mechanism to stop the machine; but sometimes the insulation, though defective for use in an electrical coil, is so little impaired that in assing over the guide-wheel 4 the wire will not metallically touch said wheel and effect-electrical contact therewith. It is therefore necessary to provide means which, without injuring the perfect insulation, shall penetrate insulation that is loose or otherwise I defective. This is accom lished by providing a series of small fiexib e feelers or contacts, as the coils of the spring 20, which is an endless ring of helically-coiled polished wire .that encompasses and lies within the groove 21 of the guide-wheel 4. The insuated wire is led upon the guide-wheel to one side of the s ring 20, passes "under it, and to the other si e of the spring, as indicated in Fig. 3. As the wheelroove 21 and the wire I of the spring are olis ed and as the tension of the spring is lig t, the insulation suffers no injury as the wire is drawn past the sprin but the coils of the spring lie at such. an angle and its tension is sufiiciently eat that when the insulation has been abra ed or is unduly loose one or more of the springs coils penetrates to the-metal of the wire and the electrical circuit is closed between the wire 12 and the wheel 4 through the spring 20.

The action of the spring-ring 20 is ractically that of a feeler, kneading and eeling the wire all over as it passes to the windin and throu h the instrumentalities describe arresting t 'e winding when any insuflicieney is felt.

Without limiting myself to any precise arrangement or mode of application, I claim- 1. In a detecting device for insulated wire the combination with a grooved wheel over which the wire runs, of a helical spring surpurpose specified.

2. In a detecting device for insulated wire or cable, the combination of a wheel or ulley over which the wire is led, and an en ess helical s ring surroundin the periphery of the whee i and adapted to ear on the wire.

3. The combination with the'stopping devices of a machine for winding insulated wire, and a sup ly from which the wire is wound and a guidb-wheelover which the wire travels, of electrical means to actuate the stopping devices of the machine, an electrical circuit including, with a source ofelectrical energy, the said electrical means, the wire bein wound and the guide-wheel, and means to e ectrically connect said wire with said guide-wheel, in the manner and forthe purpose indicated. g

4. The combination with an electromagnetic stop device, of an electric circuit, a

rounding the wheel within its groove, for the traveling wire forming one terminal of the circuit, a guide-wheel for the wire forming the other terminal, and means to electrically connect the wire with the wheel.

5. The combination in a normally open electrical circuit with an electromagnetic stop device, of a traveling insulated wire forming one terminal of the circuit, a guidewheel for the wire formingthe other terminal of the circuit, and means to'electrically connect the wire with the wheel.

6. The comhinationin a normallyopen electrical circuit with an electromagnetic stop device, of a traveling insulated wire forming one terminal of the circuit, a guidewheel for the wire forming the other terminal of the circuit, and a ring of coiled spring-wire surrounding the periphery of the guide-wheel and contacting with the insulated wire to electrically connect the wire with the wheel.

7. The combination in a normally open electrical circuit with an electromagnetic stop device, of a traveling insulated Wire forming one terminal of the circuit, a grooved guide-wheel forming the other terminal of the circuit, and a ringoffcoiled spring-wire within the groove of the wheel, for the purpose specified.

8. The combination with a winding-machine having as components a winding-spindle 2, devices for holding the supply 3 and a guide-wheel 4, electricall insulated from the machine, of an insulate wire wound from said supply u on the spindle 2, and passing over the whee 4, an electrical circuit having one terminal in the machine and another in said wire, stop devices included in the electrical circuit, and means carried on the guidewheel 4 to connect the terminals, when a defect occurs in the insulation of said wire.

9. The combination with means for feeding an insulated strip, of a stop device therefor, an electrical motor and. generator for operating said device, and a contact member arranged in circuit including said motor, gen erator and part of the strip said contact member comprising a wheel or pulley over which the strip is traveled and a spring feelerband surrounding the periphery of said wheel and bearing on the strip.

10. The combination with a traveling covered strip and means for feeding the same, of

an electric generator connected electrically with the strip and idler-pulley or guide-wheel over which said strip travels, a member carried by said guide-wheel and arranged to contact with said strip and with any part thereof where the core is exposed, a stop device for the feeding means, and an electric motor to operate the same in circuit with the generator, the contact member and strip.

1 1. The combination with means for delivering a metallic coated strip from its supply and with a stop device and electric motor therefor, of a feeler member having flexible ing devices, a supply from which the strip is i contact-fingers arranged to contact with said winding insulated metallic strips, the combistrip, and a circuit including a generator, nation with anormally open electrical circuit said member, the motor and the strip. including the strip, of a feeling device also in- 12. In a machine for Winding a covered cluded in the circuit comprisingapluralityo'f metallic strip, the combination of the windl yielding fingers adapted to be pressed into contact with thestrip to close the circuit drawn, a stop device, means for electrically I when defective insulation occurs. operating the same on completing a circuit i In testimony whereof I have signed my through the strip, and a member arranged in I name to this specification in the presence of the clifcuit to. cpmkplete the circuit when thle two subscribing witnesses. meta ic part 0 t e strip is in contact Wit 1 l T said member, said member formed with flexii SIMOB WARDWELL' ble teeth or projections for kneading and feeling the covering of the strip. i

13. Ina detecting device for machines for Witnesses:

CHAS. A. EDDY, Tnos. M. CHILDs. 

